ICF-C411 - Sony Audio Service Manual (repair manual)

Model
ICF-C411
Pages
20
Size
1.98 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-c411.pdf
Date

View Sony ICF-C411 Service Manual online

1
SERVICE MANUAL
Singapore Model
ICF-C411
FM/AM CLOCK RADIO
SPECIFICATIONS
Ver 1.0  2001.03
Sony Corporation
Audio Entertainment Group
General Engineering Dept.
9-873-096-11
2001C0400-1
© 2001.3
Time display
24-hour system
Frequency range
FM: 87.5 - 108 MHz
AM: 530 - 1710 kHz
Speaker
Approx. 6.6 cm (2 
5/8
 inches) dia., 8 ohm
Power output
120 mW (at 10% harmonic distortion)
Power requirements
220 - 230 V AC, 50 Hz
For the power back-up function: 9 V DC, one 6F22 battery
Battery life
Approx. 20 hours (for clock backup), using Sony S-006P
(6F22) battery
Dimensions
Approx. 215 
× 106.4 × 99.8 mm (w/h/d)
(8 
1/2
 
× 4 
1/4
 
× 4 inches) incl. projecting parts and controls
Mass
Approx. 780 g (1 lb 11.5 oz) not incl. battery
Design and specifications are subject to change without notice.
2
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  0  OR  DOTTED  LINE
WITH  MARK  
0  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS  WHOSE
PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  MANUAL  OR
IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
ICF-C411
TABLE OF CONTENTS
1. SERVICING NOTES
1-1.   Cord Dressing (Power Cord) ............................................... 3
1-2.   Pointer Alignment ............................................................... 3
2. GENERAL
............................................................................ 4
3. DISASSEMBLY
3-1.   Cabinet (Upper) Section ...................................................... 5
3-2.   Main Board ......................................................................... 6
3-3.   Key Board, LED Board ....................................................... 6
4. ELECTRICAL ADJUSTMENTS
................................... 7
5. DIAGRAMS
5-1.   Circuit Boards Location ...................................................... 9
5-2.   Block Diagram .................................................................. 10
5-3.   Printed Wiring Boards – Main, Power Section – .............. 11
5-4.   Printed Wiring Boards – Key, LED Section – ................... 12
5-5.   Schematic Diagram ........................................................... 13
6. EXPLODED VIEWS
6-1.   Cabinet (Upper) Section .................................................... 14
6-2.   Chassis Section ................................................................. 15
6-3.   Cabinet (Lower) Section ................................................... 16
7. ELECTRICAL PARTS LIST
......................................... 17
3
ICF-C411
SECTION 1
SERVICING NOTES
1-2. POINTER ALIGNMENT
power cord
7
screws (P 3x10)
2
pointer retainer board
8
knob (tuning)
4
gear (VC)
6
MAIN board
gear (VC)
Align is the projection. 
1
5
3
chassis
chassis
pointer
pointer
1-1. CORD DRESSING
(POWER CORD)
1) Set the power cord as shown in the figure.
4
ICF-C411
SECTION 2
GENERAL
This section is extracted
from instruction manual.
5
ICF-C411
• The equipment can be removed using the following procedure.
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CABINET (UPPER) SECTION
Set
Cabinet (Upper) Section
Main Board
Key Board, LED Board
1
screws (P 3x14)
5
cabinet (upper) section
4
CN301
2
screws (P 3x14)
3
screw (P 3x14)
6
ICF-C411
3-2. MAIN BOARD
3-3. KEY BOARD, LED BOARD
9
screws (P 3x10)
0
MAIN board
8
Removal the solder
2
screw (P 3x10)
3
screw (P 3x10)
5
claw
4
claw
6
1
knob (volume)
7
CN1
1
screw (P 3x10)
2
KEY board
4
LED board
5
LED101
3
claw
7
ICF-C411
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
86.5 MHz
109.5 MHz
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
CT2
86.5 MHz
109.5 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
515 kHz
1,750 kHz
AM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
CT1
600 kHz
1,400 kHz
  FM SECTION     0 dB = 1 µV
Setting:
BAND switch: FM
VOLUME control: MIN
  AM SECTION
Setting:
BAND switch: AM
VOLUME control: MIN
SECTION 4
ELECTRICAL ADJUSTMENTS
FM lead wire
antenna terminal
0.01
µ
F
FM RF signal
generator
400Hz, 30% FM modulation
frequency deviation 
±
22.5kHz
Output level: as low as possible
set
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
400Hz, 30%
 AM modulation
Output level: as low as possible
• Connecting Level Meter (FM and AM)
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
speaker terminal
set
16 
level meter
(range: 0.5–5 V ac)
Adjustment Location: See page 8.
8
ICF-C411
Adjustment Location:
T1
RV1
S1
BAND
SP1
L2
L1
L3
L4
FM
AM
CV1
TUNING
SP1
(SPEAKER)
CT3
CT2
CT4
CT1
CT4, L4
AM
FREQUENCY
COVERAGE
ADJUSTMENT
CT3, L3
FM
FREQUENCY
COVERAGE
ADJUSTMENT
FM
LEAD WIRE
ANTENNA
CT1, L1
AM
TRACKING
ADJUSTMENT
T1
AM
IF
ADJUSTMENT
CT2, L2
FM
TRACKING
ADJUSTMENT
– MAIN board (component side) –
ICF-C411
9
9
SECTION 5
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
Common Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
Ω and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: AM
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
Common Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
f
: internal component.
: Pattern from the side which enables seeing.
5-1. CIRCUIT BOARDS LOCATION
MAIN board
KEY board
POWER board
LED board
ICF-C411
10
10
5-2. BLOCK DIAGRAM
W5
28
16
9
1
|
13
22
23
27
AF POWER
AMP
FM IF
AM IF
FM
DISCRIMINATOR
5
17
18
RIPPLE
FILTER
INPUT
CONTROL
SLEEP
CONTROL
SNOOZE
CONTROL
OUTPUT
CONTROL
DISPLAY
CONTROL
LED101
CLOCK DISPLAY
DISPLAY
ECODER/
DRIVER
OSC
1/25 or 1/30
Q2
+B
SWITCH
Q101
24
21
TIME SET INPUT
ALM DISP
 SELECT
RT-TIME SET/ DIMMER
SLEEP/SNOOZE
ON/OFF INPUT
ALM-2 OUTPUT
ALM-1 OUTPUT
S110
S101-2
BRIGHTNESS
HIGH
S105
FAST-
S104
FAST+
S103
TIME SET
+
S109
SNOOZE
S108
SLEEP
S107
RADIO
ON
S106
OFF/
ALARM
RESET
D305
DRY BATTERY
"S-006P"9V
(IEC DESIGNATION 6F22)
T301
POWER
TRANSFORMER
+B
+B
L2
CV1-2
CT2
CV1-3 CT3
CV1-1 CT1
CV1-4 CT4
CT2,L2
FM
TRACKING
L3
L1
L4
CT3,L3
FM
FREQUENCY
COVERAGE
CT4,L4
AM
FREQUENCY
COVERAGE
CT1,L1
AM
TRACKING
AM
FERRITE-ROD
ANTENNA
CV1
TUNING
T1
AM IF
FM FRONT
-END
AM FRONT
-END
IC1
FM/AM
FRONT-END
IF AMP,DET
FM ANT
FM RF
FM OSC
AM ANT
AM OSC
VREG
13
10
15
8
11
6
MIX OUT
CF3
CF2
T1
FM
IF IN
AF IN
AF OUT
NF
+B
+B
+B
DET OUT
AM
IF IN
DISCRI
VOL
CF1
10.7MHz
VREG
Q1
RV1
VOLUME
IC101
 ALARM CLOCK
S1
BAND
AM
FM
BAND SW
SP1
(SPEAKER)
KEEP THE CORRECT
TIME DURING POWER
STOPPAGE
REG
FM
LEAD WIRE
ANTENNA
W1
SPEED/
POWER
DOWN
Q102
D202
D103 D102
D201
W2
W2
MAIN BOARD
LED BOARD
KEY BOARD
POWER BOARD
3
• Signal path
            : FM
            : AM
4
24
25
LOW
ALARM TIME/
CLOCK SET
HOLD
RADIO 
BUZZER
CLOCK
S101
(Function Selector)
S102
(Function Selector)
ALARM MODE
RADIO + BUZZER
RADIO 
BUZZER
RADIO
ALARM
BUZZER
OFF
S101
(Function Selector)
ALARM MODE
RADIO + BUZZER
RADIO 
BUZZER
OFF
D303
+B
+B
D302
PS301
D106
D107
D104
D108
27
S101-1
S102-2
S102-1
AC IN
~
CN301
SWITCH
Q103
17
SWITCH
Q301
W4
W3
CN1
20 19
3
4
3
1
2
6
1
5
7
3
6
1
5
7
1
3
4
2
+B
2-14
15-17
+B
S105
S104
S103
S109
S108
S107
S106

Download Sony ICF-C411 Service Manual (Repair Manual)

Here you can view online and download Sony ICF-C411 Service Manual in PDF. ICF-C411 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony ICF-C411 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.